Starting to lean to this too but it had to happen this arc, not in the future. Don't really see any use for this plot in the future.
Post-Enies Lobby and Post-Alabasta were gems for actually providing answers and focusing on some extended Straw Hat R&R, along with giving us some well-deserved interactions and development between the characters, especially Aokiji and Robin, Luffy and Coby, or Usopp, the giants and the crew. If Oda bothered to those more often, it would help to tie up every arc rather well.
Closest thing that comes to mind to an arc like that post-timeskip is Zou, but aside from being lackluster, that didn't really provide any answers and the minks (and their elephant) ended up being painfully underused.